Question

1. $5m + 6 - 8m^{2} - 7m + 4$

Explanation:

Step1: Group like terms

Group terms with $m^2$, $m$, and constants:
$ -8m^2 + (5m - 7m) + (6 + 4) $

Step2: Combine like terms

Simplify each grouped set:
$ -8m^2 - 2m + 10 $

Answer:

$ -8m^2 - 2m + 10 $